Definition of Twitterati in English:

plural noun

Those who use the short-message social networking service, the Twitterati, tend to get frustrated quickly by campaigns that they consider are merely pushing out PR messages, without any indication that there's a real human being behind the account.

APB out to the twitterati.

But it's intriguing to think that they may reflect the Twitterati's assessment of who is more likely to win the election: after all, who'd want to be seen talking to the eventual loser?